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NEC1-X2 (two repeats of data)

 
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NEC1



Joined: 03 Jul 2010
Posts: 56

PostPosted: Fri Nov 12, 2010 2:53 am    Post subject: NEC1-X2 (two repeats of data) Reply with quote

On a Creative RM-900 remote, I found that it outputs NEC then NEC1 protocol decodes for each function (both protocols have the same Device, Subdevice and Function codes, using DecodeIR.dll version 2.41)
A search of NEC protocols with Device 193 and Subdevice 68 revealed that the original remote Function codes corresponded to Audio Device 0872, with the protocol being NEC1-X2 and the Parameter (3rd Device number) being 22.
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The Robman
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Joined: 01 Aug 2003
Posts: 19463
Location: Chicago, IL

PostPosted: Fri Nov 12, 2010 8:18 am    Post subject: Reply with quote

Is this just an information post or do you need help with it?
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Rob
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NEC1



Joined: 03 Jul 2010
Posts: 56

PostPosted: Tue Nov 16, 2010 3:07 am    Post subject: NEC1-X2 (two repeats of data) Reply with quote

This is an information post; DecodeIR.dll needs an update to cater for this particular protocol.
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The Robman
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Location: Chicago, IL

PostPosted: Tue Nov 16, 2010 8:08 am    Post subject: Reply with quote

DecodeIR reports exactly what's there. It's up to the user to interpret what they see and select the right protocol with the right options.
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Rob
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vickyg2003
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Joined: 20 Mar 2004
Posts: 7055
Location: Florida

PostPosted: Tue Nov 16, 2010 9:50 am    Post subject: Reply with quote

I agree with Rob, decodeIR NEEDS to report this as Nec-Nec1, but I'm very happy that you called this protocol to my attention, because I was totally misreading the name of this protocol.

I was confusing Nec1-X2 with Necx1 and Necx2, because I'd never seen all three names together.

So I loaded up my Atlas and took a look at the Aud/0872 signal with my IR-Widget.

A Nec1 sends:
Nec, ditto, ditto, ditto, ditto.....

A Nec2 sends:
Nec, Nec, Nec, Nec, Nec.......

A Nec1-X2:
Nec, Nec, ditto, ditto, ditto, ditto.

A Necx1 is a signal that follows the Nec1 rules except the lead-in timing pair is smaller and ditto timings rules are different.

A Necx2 is a signal that folllows the Nec2 rules except the lead-in timing pair is smaller.
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